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  3. Chapter 8 Class 10 Introduction to Trignometry

Chapter 8 Class 10 Introduction to Trignometry

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The chapter is updated according to the new NCERT, for 2026-2026 Board Exams.

Get NCERT Solutions with videos of all questions and examples of Chapter 8 Class 10 Trigonometry. Videos of all questions are made with step-by-step explanations. Check it out now.

 

Trigonometry means studying relationship between measures of triangle. Usually, we talk about right triangles when we study trigonometry,

 

In this chapter, we will study

  • What is sin, cos, tan ( Sine, cosine, tangent) ... and how they are found in a triangle
  • What is sec, cosec, cot, and how is it related to sin, cos, tan.
  • (Sin, cos, tan, sec, cosec, cot are known as Trigonometric Ratios)
  • Then, we study Trigonometric ratios of specific angles l ike 0°, 30°, 45°, 60°, 90° ; and do some questions
  • We study the formulas of sin (90 - θ) , cos (90 - θ), tan (90 - θ)
  • And then we study Trigonometric Identities, and how other identities are derived from sin 2 θ + cos 2 θ = 1

 

To study the answers of the NCERT Questions, click on an exercise or topic below.